Abstract:
:The effects of water activity (aw, 0.994-0.90 identical to 0.4-14.0 (-)MPa water potential), temperature (4-45 degrees C), and pH (3.6, 5.5, 7.0), and their interactions on growth of isolates of Fusarium moniliforme and Fusarium proliferatum were determined in vitro on a maize extract agar medium. Growth of two isolates of F. moniliforme and four isolates of F. proliferatum were significantly influenced by water activity regardless of solute type used (NaCl, glycerol, or glucose). However, at steady-state aw levels, growth was optimum at 0.994-0.98 aw and reduced significantly at 0.92 aw. Further detailed studies with one isolate of F. moniliforme (25N) and two isolates of F. proliferatum (73N, 131N) showed that growth occurred over the range of 0.994-0.90 aw in the temperature range 20-35 degrees C with slight differences between species. Growth did occur at 4 degrees C and 0.994-0.96 aw, but no growth was recorded at 40 and 45 degrees C regardless of aw. Profiles of aw x temperature relations for growth of these two species were constructed from these data for the first time. Optimum pH and temperature for growth was 5.5 and 25 degrees C for both isolates of F. proliferatum, and pH 7.0 and 30 degrees C for the isolate of F. moniliforme. However, for the latter isolate at < 0.98 aw, optimum pH and temperature for growth changed. The effects of pH, temperature, and aw for single, two-way and three-way interactions were all found to be statistically significant for these three isolates. The ecological significance of this information for understanding these important fumonisin-producing fungi is discussed.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
Marín S,Sanchis V,Magan Ndoi
10.1139/m95-149subject
Has Abstractpub_date
1995-12-01 00:00:00pages
1063-70issue
12eissn
0008-4166issn
1480-3275journal_volume
41pub_type
杂志文章abstract::Cultures of Bacillus subtilis lysogenic for the temperature bacteriophage SP beta release "betacin", a bacteriocinlike substance that inhibits B. subtilis strains which do not carry this phage. Production of betacin is blocked by mutations in the bet gene on the prophage and a second phage gene, tol, is apparently inv...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m80-220
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journal_title:Canadian journal of microbiology
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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更新日期:2000-07-01 00:00:00
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journal_title:Canadian journal of microbiology
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journal_title:Canadian journal of microbiology
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更新日期:2019-05-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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更新日期:1978-10-01 00:00:00
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更新日期:2009-05-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m88-031
更新日期:1988-02-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m82-051
更新日期:1982-03-01 00:00:00
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journal_title:Canadian journal of microbiology
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更新日期:1976-09-01 00:00:00
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journal_title:Canadian journal of microbiology
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:
更新日期:2001-11-01 00:00:00
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journal_title:Canadian journal of microbiology
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更新日期:2000-08-01 00:00:00
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